Packing for stuffing-boxes.



F. D. BARTLETT.

PACKING FOR STUFFING BOXES. APPLICATION FILED NOV. 24. 1902.

926,841, Patented July 6,1909.

- UNITED; STATES EEENT OFFICE.

FRANK D. BARFILETT, OE SOMERVIL LE, MASSACHUSETTS.

. PACKING non ummons.

Specification r Lea-a. Patent.

, J. Patented July e: 1909.

Application nl amvemper 24, iron. se al no. means;

To all whom 'it may concern:

Be it known that I, FRANK D. BARTLETT,

I .a citizen of the. United States,.residing in Somerville, in the county of Middlesex and.

State of Massachusetts, have invented new and useful Improvements in Packings for Stuffing-Boxes, of T specification.

which the following is a 9 This invention relates to flexible packings 01'' that class which contain layers or rings composed of lubricating material, and the invention consists in the novel arrangement and contained in a stu and construction of parts fully described below whereby the portions consisting of or composed of lubricating substances are pressed against the rod or piston and are held to their work without unnecessary 'Wear.

In the drawings, in which similar letters of reference indicate correspondingparts Figwe 1 is a central vertical section-of a series or pile of packings embo ing my invention flhig-box, the rod 01' piston being illustrated in elevation. Fig. 2 is aperspective View of one of my packings removed. Fig. 3 is a detail of a portion of the central radiallycorrug'ated metallic-ring removed. Fig. 4 is a similar view of a portion' of one of the concentrically corrugated metallic rings removed.

a represents an ordinary stuffing-box, bbeing the gland, and c is a rodor piston extending through the stuffing-box.

The central'ring d of this packing is radially corrugated, and consists of a soft, flexiblemetallic com josition, preferably lead and tin, and within t e corrugations of this flexible ring is a filling of lubricating substance or composition, preferably consisting of felt, grease' and graphite, illustrated at ,e.

corrugated ring (1 are fiat rings of thin rubber f and g respectively. Directly above andb'elow the rubber rings f and g respectively are concentrically corrugated metallic rings lettered h and k respectively, and directly above and below the-corrugated rings hand is are thick rubber rings Z and a respectively. Be-

low the rubber ring n is a metallic ringshaped base All these rings are of the 5 same size ialtfiough of difierent thicknesses),

their inner es being flush, as is also the case with'their'outer'edges or pe r1 hemes. The metallic ringed, h and k, bemga made of a composition, preferablyof lead .flndtm,

are, lubricating in their nature, and'they, in

Directly above and below this filled radially ringd and the concentrically corrugated metallic rings h, is are compressed and slightly flattened whereby their inner edges are forced against the rod 0, and the'lubricatin composition or filling e is necessarily pressed or squeezed against said rod, thus effectually lubricating it, the lubricating efiect being as of the metallic rings. As there are usually a sisted by the slight wear on the inner edges 7 number of packings in=a single stuffing-box, i

as illustrated in Fig. 1, the metal rings p at the bottom of each packing operate to pre vent the particles on the inner edges of the rubber rings from wearing or rolling off.

In practice the wear on the inner edges of the metallic rings is very slight, but when such Wear occurs to an-appreciable extent, the corrugated metallic rings can be still furth er compressed and forced against the red by forcing down the gland.

The metallic ring p at the base is preferably secured to the rubber ring a by any suitable adhesive substance, and the corrugated rings may also be adhesively secured to the rubber rings e and f if desired.

In practice after the parts have been assembled, whether in a mold or otherwise, theyare usually stitched together as shown at t.

Having thus fully described my invention,

what I claim, and desire to secure by Letters Patent, is

1. In a flexible packing for stufiing-boxes,

l a flexible metallic ring formed into radial corrugations which extend to itsinner edge and are adapted to open against the rod which is surrounded by the stufling box, substanti ally flat rings on opposite sides of the radially corrugated ring, and a filling of lubricating material in said corrugations or grooves whereby when the stuffing-box 1s pressed the ring is somewhat flattened and a flexible metallic ring formed into radial the lubricating material is forced inward into contact with the rod, for the purpose set forth. L

2. In a flexible packing for stuffing-boxes,

corrugations which extend to its inner edge and are adapted to open against the rod which is surrounded by the stufling-box, the grooves produced by said corrugations narrowing toward their inner ends, substantially flat rings on opposite sides of the radially corrugated ring, and a lining of lubricating material in said corrugations or' grooves whereby when the stuffing-box is pressed the ring is somewhat flattened and the lubricating material is forced inward into contact with the rod, for the purpose set forth.

3. In a flexible packing for stufling-boxes, a substantially central flexible metallic ring formed into radial corrugations which extend to its inner edge and are adapted to open against the rod which is surrounded by the 1 stuflingbox, a pair of flexible rubber rings or 1 washers respectively above and below the central radially corrugated metallic ring, a pair of flexible metallic rings respectively above and below the two rubber rings or washers, a pair of relatively thick flexible rubber rings respectively above and below the twometallic rings which are above and below the central corrugated metallic ring, and a filling of lubricating material in the corrugations or grooves on the opposite sides of the radially corrugated ring, whereby when the stuffing-box is pressed said radially corrugated ring is somewhat flattened and the lubricating material is forced inward into contact with the rod, for the purpose set forth.

In testimony "whereof I have signed my name to this specification in the presence of two subscribing witnesses.

FRANK D. BARTLETT.

Witnesses: I

HENRY W. VVILLIAMS, M. A. ATwooD. 

